It just seems to me that common sense says - I'm entering a lane that is already in use. I am causing the change. Although I do have the right to join the lane, it's my responsibility to make sure that everyone knows I'm joining. Seems like common sense to me. Kind of like driving. I'm the one merging onto the interstate, so it's my responsibility to do it safely. It's not up to the people on the interstate to make space for me. (It's nice if they do, but they don't have to.)
It just seems to me that common sense says - I'm entering a lane that is already in use. I am causing the change. Although I do have the right to join the lane, it's my responsibility to make sure that everyone knows I'm joining. Seems like common sense to me. Kind of like driving. I'm the one merging onto the interstate, so it's my responsibility to do it safely. It's not up to the people on the interstate to make space for me. (It's nice if they do, but they don't have to.)
